CA2584198C - Palladium- and copper-free high-gold-content dental alloy - Google Patents
Palladium- and copper-free high-gold-content dental alloy Download PDFInfo
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- CA2584198C CA2584198C CA2584198A CA2584198A CA2584198C CA 2584198 C CA2584198 C CA 2584198C CA 2584198 A CA2584198 A CA 2584198A CA 2584198 A CA2584198 A CA 2584198A CA 2584198 C CA2584198 C CA 2584198C
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/02—Alloys based on gold
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
- A61K6/844—Noble metals
Abstract
The invention relates to a dental alloy with a high gold content that is devoid of palladium and copper. To achieve a high mechanical stability, the dental alloy consists of between 75 and 95 wt. % Au, between 5 and 20 wt. %
Pt, between 0.5 and 3.5 wt. % Zn and/or Sn and/or In, between 0.1 and 0.8 wt.
% of an element of a group I, in addition to a single particle refiner of a group II. The weight fraction of the element of group I is between 2 and 6 times that of the single particle refiner of group II, and one element of the group I is represented by Nb or Ta or Ti or V and the particle refiner of group II is represented by Ir or Rh.
Pt, between 0.5 and 3.5 wt. % Zn and/or Sn and/or In, between 0.1 and 0.8 wt.
% of an element of a group I, in addition to a single particle refiner of a group II. The weight fraction of the element of group I is between 2 and 6 times that of the single particle refiner of group II, and one element of the group I is represented by Nb or Ta or Ti or V and the particle refiner of group II is represented by Ir or Rh.
Description
Palladium- and copper-free high-gold-content dental alloy The invention relates to a palladium- and copper-free high-gold-content dental alloy, in particular a fire-on dental alloy, for the production of dental prostheses such as dental crowns, bridges, inlays, or onlays, containing at least platinum and at least one particle refiner.
Alloys free of palladium and copper, so-called bio-alloys, are especially used for sensitive patients. The disadvantage of these alloys is the low mechanical stability, especially during ceramic firing, compared to those high-gold-content dental alloys that contain palladium and copper. It must be noted that these particular palladium- and copper-free alloys are prone to distortions. These are caused by so-called creeping of the alloy at high temperatures, the creeping being localized at the particle boundaries.
To achieve increased high temperature stability of Pd-Cu-free high-gold-content dental alloys, one desires precipitation at the particle boundaries. Principal constituents of the precipitation phase contain high-melting elements, with no significant measurable gold content in the precipitation. Platinum is prone to undefined precipitations, which manifest themselves in an inhomogeneous distribution of the phase and in undefined morphology. In extreme cases, this leads to the formation of so-called "stars".
Independently of this, distortions arise because of undefined precipitation.
Also affected are polishability and millability of the alloy. The optical appearance is affected as the golden color of the alloy fades.
EP-A-1 193 320 discloses a fire-on high-gold-content dental alloy, which contains 80.0 to 86.5 % gold, 7.1 to 13 % platinum, 0.1 to 8 % palladium, 0 to 1.2 % silver, 0.7 to 3.5 % zinc, 0.0 to 1.0 % iron, iridium, ruthenium, rhodium, tantalum, manganese,
Alloys free of palladium and copper, so-called bio-alloys, are especially used for sensitive patients. The disadvantage of these alloys is the low mechanical stability, especially during ceramic firing, compared to those high-gold-content dental alloys that contain palladium and copper. It must be noted that these particular palladium- and copper-free alloys are prone to distortions. These are caused by so-called creeping of the alloy at high temperatures, the creeping being localized at the particle boundaries.
To achieve increased high temperature stability of Pd-Cu-free high-gold-content dental alloys, one desires precipitation at the particle boundaries. Principal constituents of the precipitation phase contain high-melting elements, with no significant measurable gold content in the precipitation. Platinum is prone to undefined precipitations, which manifest themselves in an inhomogeneous distribution of the phase and in undefined morphology. In extreme cases, this leads to the formation of so-called "stars".
Independently of this, distortions arise because of undefined precipitation.
Also affected are polishability and millability of the alloy. The optical appearance is affected as the golden color of the alloy fades.
EP-A-1 193 320 discloses a fire-on high-gold-content dental alloy, which contains 80.0 to 86.5 % gold, 7.1 to 13 % platinum, 0.1 to 8 % palladium, 0 to 1.2 % silver, 0.7 to 3.5 % zinc, 0.0 to 1.0 % iron, iridium, ruthenium, rhodium, tantalum, manganese,
2 PCT/EP2005/010992 rhenium, niobium, 0 to 3.5 % tin, indium, gallium or 0 to 0.5% copper. A
drawback of this particular alloy is its palladium content, which precludes use a bio-alloy.
US-A-5,423,680 describes a dental alloy, which is free of palladium, gallium, and copper, and possesses a high thermal expansion coefficient. The alloy can contain 50 to 75 % Au, 8 to 9 % Pt, 12.4 to 38 % Ag, 2 % In, 1 to 2 % Mn, 4 % Sn, 1 to 1.9 %
Zn, 0.05 % Jr. and 0.05 % CaB6. Platinum, niobium, and tantalum are mentioned as further ingredients.
A noble metal dental alloy in accordance with DE-A-31 32 143 contains 70 - 80 %
gold, 1 - 10 % platinum, 5 - 15 % palladium, 0.1 - 5 % tin, 0 - 5 % indium, 0 -2 %
zinc, 0.1 - 9 % silver or copper, 0.0 - 2 % iridium, rhenium, or ruthenium, as well as 0.1 ¨ 3 % cobalt, chromium, gallium, molybdenum, niobium, tantalum, or vanadium.
DE-A-100 33 445 describes a high-gold-content dental alloy that can be copper-free. In accordance with example 1, the alloy is composed of 77.6 wt. % gold, 19.6 wt.
%
platinum, 2.1 wt. % zinc, 0.6 wt. % tantalum, and 0.1 wt. % iridium.
A high-gold-content alloy in accordance with DE-A-27 46 525 contains a maximum of 0.8 wt. % tantalum and a minimum of 0.5 wt. % rhodium.
DE-A-24 N 575 describes a fife-on gold alloy, which in addition to 80 to 90 wt. % gold, to 15 wt. % platinum, 0.1 to 2 wt. % In, 0 to 2 wt. % tin and 0.05 to 0.5 wt.%
Jr also contains 0.5 to 3 wt. % rhodium. Instead of or in addition to rhodium, 0.1 to 2 wt. %
tantalum and/or wolfram may be present.
drawback of this particular alloy is its palladium content, which precludes use a bio-alloy.
US-A-5,423,680 describes a dental alloy, which is free of palladium, gallium, and copper, and possesses a high thermal expansion coefficient. The alloy can contain 50 to 75 % Au, 8 to 9 % Pt, 12.4 to 38 % Ag, 2 % In, 1 to 2 % Mn, 4 % Sn, 1 to 1.9 %
Zn, 0.05 % Jr. and 0.05 % CaB6. Platinum, niobium, and tantalum are mentioned as further ingredients.
A noble metal dental alloy in accordance with DE-A-31 32 143 contains 70 - 80 %
gold, 1 - 10 % platinum, 5 - 15 % palladium, 0.1 - 5 % tin, 0 - 5 % indium, 0 -2 %
zinc, 0.1 - 9 % silver or copper, 0.0 - 2 % iridium, rhenium, or ruthenium, as well as 0.1 ¨ 3 % cobalt, chromium, gallium, molybdenum, niobium, tantalum, or vanadium.
DE-A-100 33 445 describes a high-gold-content dental alloy that can be copper-free. In accordance with example 1, the alloy is composed of 77.6 wt. % gold, 19.6 wt.
%
platinum, 2.1 wt. % zinc, 0.6 wt. % tantalum, and 0.1 wt. % iridium.
A high-gold-content alloy in accordance with DE-A-27 46 525 contains a maximum of 0.8 wt. % tantalum and a minimum of 0.5 wt. % rhodium.
DE-A-24 N 575 describes a fife-on gold alloy, which in addition to 80 to 90 wt. % gold, to 15 wt. % platinum, 0.1 to 2 wt. % In, 0 to 2 wt. % tin and 0.05 to 0.5 wt.%
Jr also contains 0.5 to 3 wt. % rhodium. Instead of or in addition to rhodium, 0.1 to 2 wt. %
tantalum and/or wolfram may be present.
3 A fire-on gold alloy in accordance with US-A-4 062 676 contains 60% - 90% Au, 5% - 35% Pt, 0.1% - 3% In, 0% - 10% Pd, 0% - 3% Sn, 0.5% - 3% Rh, 0.1% - 2% Ta and/or W, and 0.3% -2% Zn, whereby the weight ratio of the metals of the platinum group relative to zinc, and relative to Ta and/or W is 15 - 30 : 0.5 - 1.3.
The present invention is based on the problem of further developing a palladium- and copper-free high-gold-content dental alloy of the above-mentioned type in a manner that gives rise to high mechanical stability, in particular reproducible high temperature stability.
A palladium- and copper-free high-gold-content dental alloy consists of, by weight, 80 to 91%
Au, 7.5 to 18% Pt, 1 to 2.5% of at least one element selected from the group consisting of Zn, Sn, and In, and 0.2 to 0.6% of an element of a group A selected from the group consisting of Nb, Ti and V. A single particle refiner of a group B is selected from the group consisting of Jr and Rh, wherein the weight proportion of the group A element is 2 to 6 times greater than the group B element. When the group A element is Nb, the group B element is Jr. and when the group A
element is Ti or V, the group B element is Jr or Rh.
In one preferred form the dental alloy consists of, by weight, 80 to 84% Au, 14 to 17% Pt, 1.5 to 2.2% of at least one element selected from the group consisting of In, Sn and Zn, and 0.3 to 0.5%
of said group A element, and said group B element.
According to another aspect a palladium- and copper-free high-gold-content dental alloy consists of, by weight, 75 to 95% Au, 5 to 20% Pt, 0.5 to 3.5% of at least one element selected from the group consisting of Zn, Sn, and In, and 0.1 to 0.8% of an element of a group A
selected from the group consisting of Nb, Ti and V. A single particle refiner of a group B is selected from the group consisting of Jr and Rh, wherein the weight proportion of the group A
element is 2 to 6 times greater than the group B element. When the group A element is Nb, the group B element is Ir, and when the group A element is Ti or V, the group B element is Jr or Rh.
Said Au, said Pt, said at least one element, said group A element and said group B element make up 100% by weight of said alloy.
The present invention is based on the problem of further developing a palladium- and copper-free high-gold-content dental alloy of the above-mentioned type in a manner that gives rise to high mechanical stability, in particular reproducible high temperature stability.
A palladium- and copper-free high-gold-content dental alloy consists of, by weight, 80 to 91%
Au, 7.5 to 18% Pt, 1 to 2.5% of at least one element selected from the group consisting of Zn, Sn, and In, and 0.2 to 0.6% of an element of a group A selected from the group consisting of Nb, Ti and V. A single particle refiner of a group B is selected from the group consisting of Jr and Rh, wherein the weight proportion of the group A element is 2 to 6 times greater than the group B element. When the group A element is Nb, the group B element is Jr. and when the group A
element is Ti or V, the group B element is Jr or Rh.
In one preferred form the dental alloy consists of, by weight, 80 to 84% Au, 14 to 17% Pt, 1.5 to 2.2% of at least one element selected from the group consisting of In, Sn and Zn, and 0.3 to 0.5%
of said group A element, and said group B element.
According to another aspect a palladium- and copper-free high-gold-content dental alloy consists of, by weight, 75 to 95% Au, 5 to 20% Pt, 0.5 to 3.5% of at least one element selected from the group consisting of Zn, Sn, and In, and 0.1 to 0.8% of an element of a group A
selected from the group consisting of Nb, Ti and V. A single particle refiner of a group B is selected from the group consisting of Jr and Rh, wherein the weight proportion of the group A
element is 2 to 6 times greater than the group B element. When the group A element is Nb, the group B element is Ir, and when the group A element is Ti or V, the group B element is Jr or Rh.
Said Au, said Pt, said at least one element, said group A element and said group B element make up 100% by weight of said alloy.
4 Preferably, niobium is the group I element and iridium is the single particle refiner, the weight proportion of iridium being, in particular, 0.05 to 0.15 wt. %. In particular, the palladium- and copper-free high-gold-content dental alloy is characterized in that the dental alloy consists of exactly or approximately 81.6 wt. % Au, exactly or approximately 16 wt. % Pt, exactly or approximately 1.4 wt. % Zn, exactly or approximately 0.5 wt. % In, exactly or approximately 0.4 wt. % Nb, and exactly or approximately 0.1 wt. % Jr.
The inhomogeneous distribution of the phase as well as an undefined morphology of the precipitation are the result of a non-directed, non-controlled precipitation kinetic. Elements of the periodic table that are situated directly next to each other, on top of each other, or have a diagonal relation, possess physical and chemical similarity. A related chemical/physical affinity leads, after the nucleation, to a rapid attachment of atoms, and consequently to a preferred growth direction in the structure, which in extreme cases can manifest itself in "star" formation or in dentritic precipitation.
Kinetics of the precipitation formation of this nature can surprisingly be inhibited by employing high-melting elements, which even though they take part in the precipitation phase are chemically or physically dissimilar. Surprisingly, it has been found that in the presence of niobium and the single particle refiner in form of iridium, paying special attention to the ratio of the elements niobium and particle refiner, the high-gold-content dental alloy according to the invention exhibits homogeneously defined precipitation at the particle boundaries, so that the desired mechanical stability and high temperature stability are attainable.
Consequently, in palladium- and copper-free high-gold-content dental alloys, iridium (atomic number 77; configuration 4f14, 5d7, 6s2) and niobium (atomic number 41;
configuration 4d4, 5s1) meet the requirements for inhibiting a non-directed and non-controlled precipitation kinetic.
However, a homogeneously defined precipitation at the particle boundaries of palladium- and copper-free high-gold-content dental alloys also takes place if instead of niobium one employs vanadium or titanium with weight proportions corresponding to those of niobium. If vanadium or titanium is used as replacement for niobium, one can employ iridium or rhodium as the single particle refiner. Independently thereof, the quantitative ratio of vanadium relative to iridium or rhodium, or titanium relative to iridium or rhodium corresponds to that between niobium and iridium.
Fig. 1 shows a micrograph of alloy no. 1, Fig. 2 shows a micrograph of alloy no. 2, Fig. 3 shows a micrograph of alloy no. 3, Fig. 4 shows a micrograph of alloy no. 4, Fig. 5 shows a micrograph of alloy no. 7, Fig. 6 shows a micrograph of alloy no. 5, Fig. 7 shows a micrograph of alloy no. 6, Fig. 8 shows a micrograph of alloy no. 5, which originates from a production batch, Fig. 9 shows a micrograph of alloy no. 5, which originates from a test batch, Fig. 10 shows a micrograph of alloy no. 5, which originates from a test batch, Fig. 11 shows a micrograph of alloy no. 5, which originates from a production batch, Fig. 12 shows a micrograph of alloy no. 8.
Micrographs of alloys according to the invention exhibit very fine precipitation at the particle boundaries over a wide range of gold and platinum contents, the weight proportion of gold being between 80 and 88% and that of platinum being between 10 and 18%.
As a result of the kinetic control of the precipitation, the alloy exhibits, in addition to a high distortion stability, good polishability, millability, and color stability.
Palladium- and copper-free high-gold-content alloys with a composition according to the invention are listed as nos. 5 and 6 in the following Table I:
Table I
No. Au Pt Zn In Ta Nb Jr Rh 1 81.3 16 1.7 0.5 - 0.2 - 0.3 2 85.2 11.9 1.3 0.7 - 0.4 0.1 0.4 3 85.3 12.2 1.4 0.7 0.2 - 0.2 -4 81.4 16 1.7 0.5 - - 0.1 0.3 86 11.6 1.4 0.5 - 0.4 0.1 -6 81.6 16 1.4 0.5 - 0.4 0.1 -7 84.5 12.6 1 1 - 0.3 0.1 0.5 8 81.5 16.0 1.4 0.5 0.4 - - 0.2 The high-gold content alloys listed as nos. 1-4 and 7 are also free of palladium and copper and thus are bio-alloys. However, these either contain more than one particle refiner (alloy no. 2, no.
7) or they contain group I elements and a particle refiner with weight proportions that differ from the teaching of the present invention (alloy no. 1, no. 3). Alloy no. 4 does not contain any elements of group I.
As illustrated by micrographs of alloy no. 1 (Figure 1), alloy no. 2 (Figure 2), alloy no. 3 (Figure 3), alloy no. 4 (Figure 4), and of alloy no. 7 (Figure 5), palladium- and copper-free high-gold-content alloys that do not possess the composition according to the invention are prone to undefined precipitation at the particle boundaries, which lead to dentritic structures (Figure 1), star structures (Figure 2, Figure 4), or inhomogeneous distributions (Figure 3, Figure 5).
On the other hand, the micrographs of alloy no. 5 (Figure 6) and alloy no. 6 (Figure 7), which possess a composition according to the invention and alloy no. 8 (Figure 12), exhibit homogeneous precipitation, which results in high temperature stability, which is particularly important in the firing-on of ceramics, high distortion stability, good polishability and millability. Moreover, these alloys according to the invention exhibit excellent color stability.
Figure 8 also shows a micrograph of alloy no. 5, which originates from a production batch. The same is true for alloy no. 7 (micrograph in Figure 5). The micrograph of alloy no. 5 (Figure 8) exhibits homogeneous precipitation. In contrast, the micrograph of alloy no. 7 (Figure 5), which in addition to niobium contains two particle refiners, exhibits inhomogeneous precipitation.
The micrographs in Figures 9, 10 and 11 illustrate the reproducibility of the homogeneous precipitation as a result of the niobium : iridium ration (4:1) specified by the invention in the example of alloy no. 5. Both in alloys with composition no. 5 from test batches (Figure 9, Figure 10), as well as in an alloy with composition no. 5 from a production charge, finely distributed precipitations are observed at the particle boundaries, which give rise to the outstanding material characteristics of the cadmium- and copper-free high-gold-content alloy according to the invention.
The inhomogeneous distribution of the phase as well as an undefined morphology of the precipitation are the result of a non-directed, non-controlled precipitation kinetic. Elements of the periodic table that are situated directly next to each other, on top of each other, or have a diagonal relation, possess physical and chemical similarity. A related chemical/physical affinity leads, after the nucleation, to a rapid attachment of atoms, and consequently to a preferred growth direction in the structure, which in extreme cases can manifest itself in "star" formation or in dentritic precipitation.
Kinetics of the precipitation formation of this nature can surprisingly be inhibited by employing high-melting elements, which even though they take part in the precipitation phase are chemically or physically dissimilar. Surprisingly, it has been found that in the presence of niobium and the single particle refiner in form of iridium, paying special attention to the ratio of the elements niobium and particle refiner, the high-gold-content dental alloy according to the invention exhibits homogeneously defined precipitation at the particle boundaries, so that the desired mechanical stability and high temperature stability are attainable.
Consequently, in palladium- and copper-free high-gold-content dental alloys, iridium (atomic number 77; configuration 4f14, 5d7, 6s2) and niobium (atomic number 41;
configuration 4d4, 5s1) meet the requirements for inhibiting a non-directed and non-controlled precipitation kinetic.
However, a homogeneously defined precipitation at the particle boundaries of palladium- and copper-free high-gold-content dental alloys also takes place if instead of niobium one employs vanadium or titanium with weight proportions corresponding to those of niobium. If vanadium or titanium is used as replacement for niobium, one can employ iridium or rhodium as the single particle refiner. Independently thereof, the quantitative ratio of vanadium relative to iridium or rhodium, or titanium relative to iridium or rhodium corresponds to that between niobium and iridium.
Fig. 1 shows a micrograph of alloy no. 1, Fig. 2 shows a micrograph of alloy no. 2, Fig. 3 shows a micrograph of alloy no. 3, Fig. 4 shows a micrograph of alloy no. 4, Fig. 5 shows a micrograph of alloy no. 7, Fig. 6 shows a micrograph of alloy no. 5, Fig. 7 shows a micrograph of alloy no. 6, Fig. 8 shows a micrograph of alloy no. 5, which originates from a production batch, Fig. 9 shows a micrograph of alloy no. 5, which originates from a test batch, Fig. 10 shows a micrograph of alloy no. 5, which originates from a test batch, Fig. 11 shows a micrograph of alloy no. 5, which originates from a production batch, Fig. 12 shows a micrograph of alloy no. 8.
Micrographs of alloys according to the invention exhibit very fine precipitation at the particle boundaries over a wide range of gold and platinum contents, the weight proportion of gold being between 80 and 88% and that of platinum being between 10 and 18%.
As a result of the kinetic control of the precipitation, the alloy exhibits, in addition to a high distortion stability, good polishability, millability, and color stability.
Palladium- and copper-free high-gold-content alloys with a composition according to the invention are listed as nos. 5 and 6 in the following Table I:
Table I
No. Au Pt Zn In Ta Nb Jr Rh 1 81.3 16 1.7 0.5 - 0.2 - 0.3 2 85.2 11.9 1.3 0.7 - 0.4 0.1 0.4 3 85.3 12.2 1.4 0.7 0.2 - 0.2 -4 81.4 16 1.7 0.5 - - 0.1 0.3 86 11.6 1.4 0.5 - 0.4 0.1 -6 81.6 16 1.4 0.5 - 0.4 0.1 -7 84.5 12.6 1 1 - 0.3 0.1 0.5 8 81.5 16.0 1.4 0.5 0.4 - - 0.2 The high-gold content alloys listed as nos. 1-4 and 7 are also free of palladium and copper and thus are bio-alloys. However, these either contain more than one particle refiner (alloy no. 2, no.
7) or they contain group I elements and a particle refiner with weight proportions that differ from the teaching of the present invention (alloy no. 1, no. 3). Alloy no. 4 does not contain any elements of group I.
As illustrated by micrographs of alloy no. 1 (Figure 1), alloy no. 2 (Figure 2), alloy no. 3 (Figure 3), alloy no. 4 (Figure 4), and of alloy no. 7 (Figure 5), palladium- and copper-free high-gold-content alloys that do not possess the composition according to the invention are prone to undefined precipitation at the particle boundaries, which lead to dentritic structures (Figure 1), star structures (Figure 2, Figure 4), or inhomogeneous distributions (Figure 3, Figure 5).
On the other hand, the micrographs of alloy no. 5 (Figure 6) and alloy no. 6 (Figure 7), which possess a composition according to the invention and alloy no. 8 (Figure 12), exhibit homogeneous precipitation, which results in high temperature stability, which is particularly important in the firing-on of ceramics, high distortion stability, good polishability and millability. Moreover, these alloys according to the invention exhibit excellent color stability.
Figure 8 also shows a micrograph of alloy no. 5, which originates from a production batch. The same is true for alloy no. 7 (micrograph in Figure 5). The micrograph of alloy no. 5 (Figure 8) exhibits homogeneous precipitation. In contrast, the micrograph of alloy no. 7 (Figure 5), which in addition to niobium contains two particle refiners, exhibits inhomogeneous precipitation.
The micrographs in Figures 9, 10 and 11 illustrate the reproducibility of the homogeneous precipitation as a result of the niobium : iridium ration (4:1) specified by the invention in the example of alloy no. 5. Both in alloys with composition no. 5 from test batches (Figure 9, Figure 10), as well as in an alloy with composition no. 5 from a production charge, finely distributed precipitations are observed at the particle boundaries, which give rise to the outstanding material characteristics of the cadmium- and copper-free high-gold-content alloy according to the invention.
Claims (9)
1. Palladium- and copper-free high-gold-content dental alloy, the dental alloy consisting of, by weight:
80 to 91% Au, 7.5 to 18% Pt, 1 to 2.5% of at least one element selected from the group consisting of Zn, Sn, and In, 0.2 to 0.6% of an element of a group A selected from the group consisting of Nb, Ti and V, and a single particle refiner of a group B selected from the group consisting of Ir and Rh, wherein the weight proportion of the group A element is 2 to 6 times greater than the group B element, and wherein when the group A element is Nb, the group B element is Ir, and when the group A element is Ti or V, the group B element is Ir or Rh.
80 to 91% Au, 7.5 to 18% Pt, 1 to 2.5% of at least one element selected from the group consisting of Zn, Sn, and In, 0.2 to 0.6% of an element of a group A selected from the group consisting of Nb, Ti and V, and a single particle refiner of a group B selected from the group consisting of Ir and Rh, wherein the weight proportion of the group A element is 2 to 6 times greater than the group B element, and wherein when the group A element is Nb, the group B element is Ir, and when the group A element is Ti or V, the group B element is Ir or Rh.
2. Dental alloy of claim 1, wherein the dental alloy consists of, by weight, 80 to 84% Au, 14 to 17% Pt, 1.5 to 2.2% of at least one element selected from the group consisting of In, Sn and Zn, and 0.3 to 0.5% of said group A element, and said group B element.
3. Dental alloy of claim 1, containing, by weight, 0.05 to 0.15% Ir.
4. Dental alloy of claim 1, consisting of, by weight, 81.6% Au, 16% Pt, 1.4% Zn, 0.5% In, 0.4% Nb, and 0.1% Ir.
5. Palladium- and copper-free high-gold-content dental alloy, the dental alloy consisting of, by weight:
75 to 95% Au, to 20% Pt, 0.5 to 3.5% of at least one element selected from the group consisting of Zn, Sn, and In, 0.1 to 0.8% of an element of a group A selected from the group consisting of Nb, Ti and V, and a single particle refiner of a group B selected from the group consisting of Ir and Rh, wherein the weight proportion of the group A element is 2 to 6 times greater than the group B element, wherein when the group A element is Nb, the group B element is Ir, and when the group A element is Ti or V, the group B element is Ir or Rh, and wherein said Au, said Pt, said at least one element, said group A element and said group B element make up 100% by weight of said alloy.
75 to 95% Au, to 20% Pt, 0.5 to 3.5% of at least one element selected from the group consisting of Zn, Sn, and In, 0.1 to 0.8% of an element of a group A selected from the group consisting of Nb, Ti and V, and a single particle refiner of a group B selected from the group consisting of Ir and Rh, wherein the weight proportion of the group A element is 2 to 6 times greater than the group B element, wherein when the group A element is Nb, the group B element is Ir, and when the group A element is Ti or V, the group B element is Ir or Rh, and wherein said Au, said Pt, said at least one element, said group A element and said group B element make up 100% by weight of said alloy.
6. Dental alloy of claim 1, wherein the group A element is V and the group B element is Ir or Rh.
7. Dental alloy of claim 1, wherein the group A element is Ti and the group B element is Ir or Rh.
8. Dental alloy of claim 5, wherein the group A element is V and the group B element is Ir or Rh.
9. Dental alloy of claim 5, wherein the group A element is Ti and the group B element is Ir or Rh.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004050594A DE102004050594A1 (en) | 2004-10-16 | 2004-10-16 | Palladium-free, copper-free, high-gold dental alloy, useful for producing dental prostheses, contains added specified high-melting elements |
| DE102004050594.2 | 2004-10-16 | ||
| PCT/EP2005/010992 WO2006040145A1 (en) | 2004-10-16 | 2005-10-13 | Dental alloy with a high gold content that is devoid of palladium and copper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2584198A1 CA2584198A1 (en) | 2006-04-20 |
| CA2584198C true CA2584198C (en) | 2014-03-04 |
Family
ID=34625872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2584198A Active CA2584198C (en) | 2004-10-16 | 2005-10-13 | Palladium- and copper-free high-gold-content dental alloy |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US8524150B2 (en) |
| EP (1) | EP1799873B1 (en) |
| JP (1) | JP5096158B2 (en) |
| KR (1) | KR101299416B1 (en) |
| AT (1) | ATE452215T1 (en) |
| AU (1) | AU2005293744A1 (en) |
| CA (1) | CA2584198C (en) |
| DE (2) | DE102004050594A1 (en) |
| NO (1) | NO20072504L (en) |
| WO (1) | WO2006040145A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2923492A1 (en) * | 2007-11-12 | 2009-05-15 | Gerard Bienvenu | White gold alloy, useful to prepare materials for optoelectronics and in jewelry, where the gold is combined with at least one refractory metal of IVB, VB and VIB column of periodic table |
| EP2368539B1 (en) | 2010-03-26 | 2018-09-05 | DENTSPLY SIRONA Inc. | Dental alloy |
| CN101921925B (en) * | 2010-09-08 | 2011-11-23 | 深圳市金福珠宝首饰有限公司 | Gold alloy and preparation method thereof |
| WO2014087216A1 (en) | 2012-12-03 | 2014-06-12 | Argor-Heraeus Sa | Discoloration-resistant gold alloy |
| FR3034106B1 (en) * | 2015-03-23 | 2022-07-22 | Centre Nat Rech Scient | MONOPHASIC ALLOY OF GOLD AND TUNGSTEN |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2424575C3 (en) * | 1974-05-21 | 1979-08-30 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | Gold alloy for firing porcelain for dental purposes |
| US4062676A (en) * | 1976-07-06 | 1977-12-13 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Gold alloy for firing on porcelain for dental purposes |
| DE2746525A1 (en) | 1977-10-17 | 1979-04-19 | Degussa | Yellow dental gold alloy for fusing to porcelain - also contains zinc, platinum, opt. palladium, rhodium, tantalum and/or tungsten |
| DE2755913C3 (en) * | 1977-12-15 | 1981-03-19 | Degussa Ag, 6000 Frankfurt | Gold alloy for firing porcelain for dental purposes |
| DE3132143C2 (en) | 1981-08-14 | 1985-07-04 | Degussa Ag, 6000 Frankfurt | Precious metal alloy for the production of crowns and bridges that can be veneered with ceramic bodies |
| NL9001986A (en) * | 1990-09-10 | 1992-04-01 | Elephant Edelmetaal Bv | DENTAL PORCELAIN, METHOD FOR MANUFACTURING A DENTAL RESTORATION, DENTAL ALLOY. |
| DE4031169C1 (en) | 1990-10-03 | 1992-04-23 | Degussa Ag, 6000 Frankfurt, De | |
| NL9200564A (en) * | 1992-03-26 | 1993-10-18 | Elephant Edelmetaal Bv | Dental alloy and dental porcelain for dental purposes. |
| US5423680A (en) * | 1993-11-10 | 1995-06-13 | Jeneric/Pentron, Incorporated | Palladium, gallium and copper-free alloy having high thermal expansion coefficient |
| JPH0967628A (en) * | 1995-08-31 | 1997-03-11 | Shosuke Otsuka | Dental gold-titanium alloy |
| EP0904765A2 (en) * | 1997-09-25 | 1999-03-31 | Ivoclar Ag | Gold coloured dental alloy |
| DE10033445A1 (en) | 2000-07-10 | 2002-01-24 | Trampert Dental Gmbh | Dental alloy used as a casting alloy or cutting alloy, especially for implants, contains gold |
| DE10042316C1 (en) | 2000-08-29 | 2002-03-21 | Binder Dental Gmbh | Dental alloy used for repairing dental prostheses contains gold, silver, platinum, zinc, niobium, iridium, rhodium and tantalum |
| ATE291103T1 (en) | 2000-09-29 | 2005-04-15 | Cendres & Metaux Sa | FLAMMABLE, HIGH-GOLD DENTAL ALLOY |
| JP3983659B2 (en) * | 2002-11-19 | 2007-09-26 | 株式会社松風 | Dental porcelain gold alloy |
-
2004
- 2004-10-16 DE DE102004050594A patent/DE102004050594A1/en not_active Withdrawn
-
2005
- 2005-10-13 CA CA2584198A patent/CA2584198C/en active Active
- 2005-10-13 JP JP2007536085A patent/JP5096158B2/en active Active
- 2005-10-13 EP EP05794900A patent/EP1799873B1/en active Active
- 2005-10-13 AU AU2005293744A patent/AU2005293744A1/en not_active Abandoned
- 2005-10-13 WO PCT/EP2005/010992 patent/WO2006040145A1/en active Application Filing
- 2005-10-13 DE DE502005008717T patent/DE502005008717D1/en active Active
- 2005-10-13 US US11/665,454 patent/US8524150B2/en active Active
- 2005-10-13 AT AT05794900T patent/ATE452215T1/en active
- 2005-10-13 KR KR1020077011020A patent/KR101299416B1/en active IP Right Grant
-
2007
- 2007-05-15 NO NO20072504A patent/NO20072504L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NO20072504L (en) | 2007-05-15 |
| KR20070063599A (en) | 2007-06-19 |
| KR101299416B1 (en) | 2013-08-28 |
| JP2008517149A (en) | 2008-05-22 |
| US8524150B2 (en) | 2013-09-03 |
| ATE452215T1 (en) | 2010-01-15 |
| CA2584198A1 (en) | 2006-04-20 |
| EP1799873A1 (en) | 2007-06-27 |
| JP5096158B2 (en) | 2012-12-12 |
| US20080152535A1 (en) | 2008-06-26 |
| WO2006040145A1 (en) | 2006-04-20 |
| EP1799873B1 (en) | 2009-12-16 |
| DE502005008717D1 (en) | 2010-01-28 |
| AU2005293744A1 (en) | 2006-04-20 |
| DE102004050594A1 (en) | 2005-06-30 |
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